Just wanted to put this out there for anyone looking for an alternative to photoshop to use for concepts... (Mods if you feel this should be in General Design please move it)
Affinity Photo
-Only $50, no subscription
-Can open .PSD files and save them
-Takes some getting used to if you usually use photoshop, but not that different
-$20 iPad app (for newer iPads only)
Affinity Designer
-Only $50, no subscription
-Like Illustrator but I don't believe it can open .AI files
There are free 7-day trials for both. (Photo, Designer). FYI the trials are strict on their days, unlike photoshop which gives you one extra session after the trial.
I hope this doesn't seem like an ad but should provide you with another option for graphic design.